In the bowl of a stand mixer fitted with the paddle attachment, add the gluten-free bread flour, granulated sugar, instant yeast, salt and baking powder. Mix to combine.
With the mixer running on low, slowly add the water, milk, eggs and melted butter. Increase the speed to medium and mix for 3 minutes. The dough will resemble thick cookie dough, this is normal.
Using an oiled rubber spatula, scrape down the bottom and sides of the bowl. Cover the bowl tightly with plastic wrap and refrigerate for 30 minutes. (Refrigerating the dough makes it easier to roll out.)
In a small bowl, mix together the brown sugar and cinnamon for the filling.
Line a large baking sheet with parchment paper or a silicone baking mat.
Turn out the dough onto a lightly floured surface and shape into a ball. Sprinkle with a little gluten-free flour, then roll the dough out into a 16×16-inch square.
Spread the melted butter for the filling over the dough. Sprinkle the cinnamon-sugar all over the buttered dough.
Using a pizza cutter, cut the square into sixteen 1-inch wide strips.
Roll each dough strip up into a cinnamon roll.
Lay the cinnamon rolls on top of each other in an even circle to form a wreath.
Cover the baking sheet with plastic wrap and place in a warm place. Allow the rolls to rise for 45-60 minutes.
Preheat the oven to 350°F. Bake for 30-35 minutes, or until the rolls are slightly golden brown.
Remove from the oven and let cool for 15 minutes before topping with the glaze.